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4 years ago

Help again please ..

Mathematics

1 answer:

Aliun [14]4 years ago

4 0

The zeros or roots here are 0 and 7 so the answer is D. Explanation is same as last one so I didn't type it all out, but go about solving it and all of these the same way.

Thanks! Hope this helps!

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3 • 4/12 to the simplest form

beks73 [17]

9 because you would turn 4 12 in simplest form the times it by 3

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3 years ago

What are the solutions of the equation

Sever21 [200]

B should be correct.

6 0

4 years ago

Question :

Darya [45]

Answer:

1156

Step-by-step explanation:

We know that,

( a + b ) ² = a² + 2ab + b²

We can follow the same method to find the value of this.

12² + 22²

( 12 + 22 ) ²

12² + 2 × 12 × 22 + 22²

144 + 24 × 22 + 484

144 + 528 + 484

672 + 484

1156

Let me know if you have any other questions. :)

6 0

3 years ago

What is the value of z for the parallelogram shown? A.130 B.40 C.10 D.26

galben [10]

Z=10 because the opposite side is 50 degrees so the 5z=50

If you solve, z=10

7 0

4 years ago

Read 2 more answers

The average gasoline price of one of the major oil companies in Europe has been $1.25 per liter. Recently, the company has under

Ann [662]

Answer:

$t=\frac{1.20-1.25}{\frac{0.14}{\sqrt{49}}}=-2.50$

Step-by-step explanation:

Data given and notation

$\bar X=1.20$ represent the sample mean given

$\sigma = 0.14$ represent the population standard deviation

$n=49$ sample size

$\mu_o =1.25$ represent the value that we want to test

t would represent the statistic (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the true mean for the gasoline prices is lower than 1.25, the system of hypothesis would be:

Null hypothesis: $\mu \geq 1.25$

Alternative hypothesis: $\mu < 1.25$

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{1.20-1.25}{\frac{0.14}{\sqrt{49}}}=-2.50$

5 0

3 years ago